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by PHXcoach
November 5th, 2017, 9:00 pm
Forum: 2018 Lab Events
Topic: Optics B/C
Replies: 195
Views: 24152

Re: Optics B/C

Guys, do you think it would be easier building a brand new LSS or retrofitting an old one to fit the standards. My experience was that the work I did on the retrofit didn't really overlap with the work to make the original LSS, It was additional work, so I don't see how it would be less or even the...
by PHXcoach
November 3rd, 2017, 8:41 am
Forum: 2018 Lab Events
Topic: Optics B/C
Replies: 195
Views: 24152

Re: LSS Retrofit Instructions (strawman)

Thank you for the suggestions. Comments below: 3. The biggest challenge I've found (and hence the delay in producing an official document like this) is cutting the metal sheet. You can buy metal sheets at Lowes / Home Depot anywhere in the country, but cutting it down to size is challenging. You did...
by PHXcoach
November 2nd, 2017, 4:07 pm
Forum: 2018 Lab Events
Topic: Optics B/C
Replies: 195
Views: 24152

LSS Retrofit Instructions (strawman)

I have an invitational coming up this weekend so I took a shot at instructions to retrofit an LSS with a metal base to meet the recommendations in the 2018 rules. Since I am a little out of my depth here I have posted a link to it with the intent of incorporating comments and suggestions, and then a...
by PHXcoach
September 19th, 2017, 9:14 am
Forum: Wright Stuff B
Topic: Wright Stuff B
Replies: 102
Views: 35997

Why is the Visibility marker black this year?

Can someone explain why the visibility marker has to be black this year instead of colored?

I preferred color which made it easier to identify planes both between and within teams.
by PHXcoach
September 5th, 2017, 8:59 am
Forum: 2018 Lab Events
Topic: Hovercraft B/C
Replies: 627
Views: 68220

Re: Hovercraft B/C

Don't forget that the track width has changed from 20 cm to 60 cm.
Since the track is now much wider than the maximum hovercraft width some of the designs from last year to control the run time may no longer work.
Also the timing gates that we used last year won't work with the new track width.
by PHXcoach
October 12th, 2016, 8:47 pm
Forum: 2017 Lab Events
Topic: Wind Power B/C
Replies: 338
Views: 35436

Re: Wind Power B/C

Can someone help elaborate or explain this Power loss and voltage problem show in the attach picture? This taken from one of the invitational test. I understand that P(loss) = I*I*R or P(loss) = V*V/R, but it still does not explain the reasoning behind the answer? Base on the latter equation P(loss...
by PHXcoach
October 6th, 2016, 9:13 am
Forum: 2017 Lab Events
Topic: Wind Power B/C
Replies: 338
Views: 35436

Re: Wind Power B/C

Hi, I'm completely new to this event. How do you measure your own turbine's voltage with a voltmeter? I'm not sure how to attach it. Don't forget to add the load resistor. There is a schematic in the rules this year that shows the connection of the motor, the resistor and the voltmeter. There are a...
by PHXcoach
September 28th, 2016, 9:45 am
Forum: 2017 Lab Events
Topic: Wind Power B/C
Replies: 338
Views: 35436

Re: Wind Power B/C

I posted instructions for building a test stand and fan stand for Wind Power. Test stand instructions: http://scioly.org/wiki/images/9/9d/Wind_Power_Test_Stand.pdf Fan stand instructions: http://scioly.org/wiki/images/8/86/Wind_Power_Fan_Stand.pdf Feel free to use them in full, or just to extract su...
by PHXcoach
September 17th, 2016, 1:09 am
Forum: 2017 Lab Events
Topic: Hovercraft B/C
Replies: 906
Views: 120486

Re: Hovercraft B/C

I am not sure that I follow rule 6.e. where a penalty is applied to the timing score of any run that has a competition violation. All the competition violations that I see result in a failed run (i.e. TS = 0) so what are the competition violations that don't cause a failed run and would trigger thi...
by PHXcoach
September 16th, 2016, 2:46 pm
Forum: 2017 Lab Events
Topic: Wind Power B/C
Replies: 338
Views: 35436

Re: Wind Power B/C

In the diagram below, where does the Volt Meter probe goes? A, B, C? or does it matter? Any will work since the voltmeter takes negligible current, but I normally use position B. Position C is really position B with longer voltmeter leads, so positions B and C will give the same reading. Position A...

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